We run a W2K3 Domain Controller with 4 local drives / partitions C: D: E: and J:

On the DC we run some proprietory software that requires mapped drives F: H: and T:

We backup to a series of 320GB USB External HDDs. The backup is configured to save to a folder on a drive G: so the External HDDs need to take the Drive Letter G: when plugged in. No matter what I do, the darn Drive Letters won't stick. When I plug the External HDD in, it usually takes the letter F: because the system sees that as the next available letter, even though there is a mapped drive F:

I usually go into Administrative Tools | Computer Management | Disk Management and change the Drive Letter to G: but that gets tedious every day. Also, on the occasions when I am away and somebody else has to change over the backup disks, I don't like having to explain that procedure to them every time.

I have tried Removing the F: letter before Adding the G: letter. I have tried reformatting the drive and giving it the letter G: in the process. Sometimes (but only sometimes) it shows up with the letter G: next time I plug in that drive, but more often than not it takes F: and has to be changed.